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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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Quest Diagnostics - Tracy 1832 W 11th St

1832 W 11Th St,

Tracy, CA 95376

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1.71 mi away

Schedule Appointment 209-830-1350
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Manteca Norman Drive - Employer Drug Testing Not Offered

1140 Norman Dr,

Ste 2

Manteca, CA 95336

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15.45 mi away

Schedule Appointment 209-825-4158
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Manteca East Commerce Avenue

293 East Commerce Ave,

Manteca, CA 95336

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15.77 mi away

Schedule Appointment 209-823-2560
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 6:30 am-10:30 am
Sunday: Closed
Quest Diagnostics - Livermore East Stanley - Employer Drug Testing Not Offered

1090 E Stanley Blvd,

Livermore, CA 94550

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16.55 mi away

Schedule Appointment 925-245-0375
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Brentwood Central Boulevard

1181 Central Boulevard,

Suite C

Brentwood, CA 94513

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19.01 mi away

Schedule Appointment 925-516-4900
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Stockton W March Ln - Employer Drug Testing Not Offered

3132 W March Ln,

Ste 1

Stockton, CA 95219

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19.16 mi away

Schedule Appointment 209-956-2624
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Stockton East Magnolia

510 E. Magnolia Street,

STE 130

Stockton, CA 95202

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19.46 mi away

Schedule Appointment 209-941-2468
Monday: 6:30 am-5:30 pm
Tuesday: 6:30 am-5:30 pm
Wednesday: 6:30 am-5:30 pm
Thursday: 6:30 am-5:30 pm
Friday: 6:30 am-5:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - 2291 West March

2291 W March Ln,

Ste F145

Stockton, CA 95207

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19.75 mi away

Schedule Appointment 209-951-5831
Monday: 7:30 am-3:00 pm
Tuesday: 7:30 am-3:00 pm
Wednesday: 7:30 am-3:00 pm
Thursday: 7:30 am-3:00 pm
Friday: 7:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Inside Dublin Safeway Tassajara Road

4440 Tassajara Rd,

Dublin, CA 94568

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21.13 mi away

Schedule Appointment 925-519-3352
Monday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Stockton 1801 East March

1801 E March Ln,

Ste B200

Stockton, CA 95210

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21.87 mi away

Schedule Appointment 209-956-2815
Monday: 6:30 am-4:30 pm
Tuesday: 6:30 am-4:30 pm
Wednesday: 6:30 am-4:30 pm
Thursday: 6:30 am-4:30 pm
Friday: 6:30 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Employer Drug Screens Not Offered - Hammer Lane

1708 W Hammer Ln,

Stockton, CA 95209

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21.93 mi away

Schedule Appointment 209-955-1288
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Modesto Pelandale Ave

3525 Pelandale Ave,

Modesto, CA 95356

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22.11 mi away

Schedule Appointment 209-222-1754
Monday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Pleasanton Stoneridge Mall - Employer Drug Testing Not Offered

5720 Stoneridge Mall Road,

Suite 110

Pleasanton, CA 94588

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24.21 mi away

Schedule Appointment 925-227-0180
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Antioch Lone Tree Way - Employer Drug Testing Not Offered

4049 Lone Tree Way,

Suite F

Antioch, CA 94531

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24.49 mi away

Schedule Appointment 925-477-0412
Monday: 7:30 am-11:30 am , 12:30 pm-3:30 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-3:30 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-3:30 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-3:30 pm
Friday: 7:30 am-11:30 am , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed

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Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.